Discover / sellat.app

sellat.app

□ No challenge detected

Timestamp and notarize any file or data by its SHA-256 hash: blockchain proof of existence and document integrity, anchored on Polygon in minutes and attested on Bitcoin (OpenTimestamps); blockchain notarization, not a notary act. Returns proof_id, certificate, proof.json and evidence ZIP, verifiable without Sellat. Use when you must prove that exact data existed by now and is intact.

Listed price
$0.01
Challenge detected
0 of the last 3 checks
Last checked
21 Oct, 12:22 UTC
In our index since
18 Oct 2026

Endpoint

curl -i https://sellat.app/api/v2/proofs
# 402 Payment Required: pay with an x402 client (USDC on Base),
# then send the same request again with the payment attached.
2 listed endpoints · on x402 Bazaar

Checks and payment terms on this page refer to the endpoint above. Other listed endpoints have not been checked individually.

Base URLhttps://sellat.app/api/v2

  • POST/proofs/:id/qualified$0.9eIDAS qualified electronic timestamp (RFC 3161 .tsr) on a Sellat proof, issued in seconds by an EU qualified trust service provider on the EU trusted list. Legal timestamp with the presumption of accuracy of date and integrity of Art. 41.2 eIDAS, recognised across the EU. Use when the date must hold before a court, authority, regulator or auditor. Call it on the proof_id from POST /proofs.
  • POST/proofs$0.01Timestamp and notarize any file or data by its SHA-256 hash: blockchain proof of existence and document integrity, anchored on Polygon in minutes and attested on Bitcoin (OpenTimestamps); blockchain notarization, not a notary act. Returns proof_id, certificate, proof.json and evidence ZIP, verifiable without Sellat. Use when you must prove that exact data existed by now and is intact.

A dash means the listing gives no price or method. Copy buttons copy the full URL.

Showing 2 of 2 listed endpoints.

Agents can find it through the Superstables MCP server and JSON API: GET /api/v1/services/sellat.app

Recent checks

18 Oct 2026One bar per check, showing up to 20 recent checks. Coloured bars show relative response time, with a minimum visible height; full-height grey bars mean no challenge was detected. “Challenge detected” means HTTP 402 or another detected payment-challenge signal.21 Oct 2026
All 3 checks
When (UTC)ResultHTTPResponse
21 Oct, 12:22 UTCNo challenge detected401702ms
20 Oct, 03:20 UTCNo challenge detected401656ms
18 Oct, 18:22 UTCNo challenge detected401347ms

Questions

Did our last probe detect a payment challenge?

No. At our last probe on 21 Oct, 12:22 UTC, we detected no payment challenge.

What price is recorded for sellat.app?

Its listed price is $0.01.

What payment terms does sellat.app advertise?

The listing advertises x402, Base and USDC. It names cdp as its facilitator. Check the seller's current payment challenge and authentication requirements before paying.

Where is sellat.app listed?

In x402 Bazaar. Superstables first indexed it on 18 Oct 2026.

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